← Claude Code changelog

Claude Code 2.1.117

This release delivers significant user experience enhancements and performance optimizations. Users will benefit from persistent model selections across restarts, comprehensive plugin dependency resolution, and faster startup times. Native searches on macOS and Linux are now quicker, along with more reliable OAuth sessions and improved handling of large web pages. Various critical fixes ensure a more stable and predictable experience for all users.

Improved

  • Improved `/model`: selections now persist across restarts even when the project pins a different model, and the startup header shows when the active model comes from a project or managed-settings pin

Changed

  • Forked subagents can now be enabled on external builds by setting `CLAUDE_CODE_FORK_SUBAGENT=1`
  • Agent frontmatter `mcpServers` are now loaded for main-thread agent sessions via `--agent`
  • The `/resume` command now offers to summarize stale, large sessions before re-reading them, matching the existing `--resume` behavior
  • Faster startup when both local and claude.ai MCP servers are configured (concurrent connect now default)
  • `plugin install` on an already-installed plugin now installs any missing dependencies instead of stopping at "already installed"
  • Plugin dependency errors now say "not installed" with an install hint, and `claude plugin marketplace add` now auto-resolves missing dependencies from configured marketplaces
  • Managed-settings `blockedMarketplaces` and `strictKnownMarketplaces` are now enforced on plugin install, update, refresh, and autoupdate
  • Advisor Tool (experimental): dialog now carries an "experimental" label, learn-more link, and startup notification when enabled; sessions no longer get stuck with "Advisor tool result content could not be processed" errors on every prompt and `/compact`
  • The `cleanupPeriodDays` retention sweep now also covers `~/.claude/tasks/`, `~/.claude/shell-snapshots/`, and `~/.claude/backups/`
  • OpenTelemetry: `user_prompt` events now include `command_name` and `command_source` for slash commands; `cost.usage`, `token.usage`, `api_request`, and `api_error` now include an `effort` attribute when the model supports effort levels. Custom/MCP command names are redacted unless `OTEL_LOG_TOOL_DETAILS=1` is set
  • Native builds on macOS and Linux: the `Glob` and `Grep` tools are replaced by embedded `bfs` and `ugrep` available through the Bash tool — faster searches without a separate tool round-trip (Windows and npm-installed builds unchanged)
  • Windows: cached `where.exe` executable lookups per process for faster subprocess launches
  • Default effort for Pro/Max subscribers on Opus 4.6 and Sonnet 4.6 is now `high` (was `medium`)

Fixed

  • Fixed Plain-CLI OAuth sessions dying with "Please run /login" when the access token expires mid-session — the token is now refreshed reactively on 401
  • Fixed `WebFetch` hanging on very large HTML pages by truncating input before HTML-to-markdown conversion
  • Fixed a crash when a proxy returns HTTP 204 No Content — now surfaces a clear error instead of a `TypeError`
  • Fixed `/login` having no effect when launched with `CLAUDE_CODE_OAUTH_TOKEN` env var and that token expires
  • Fixed prompt-input undo (`Ctrl+_`) doing nothing immediately after typing, and skipping a state on each undo step
  • Fixed `NO_PROXY` not being respected for remote API requests when running under Bun
  • Fixed rare spurious escape/return triggers when key names arrive as coalesced text over slow connections
  • Fixed SDK `reload_plugins` reconnecting all user MCP servers serially
  • Fixed Bedrock application-inference-profile requests failing with 400 when backed by Opus 4.7 with thinking disabled
  • Fixed MCP `elicitation/create` requests auto-cancelling in print/SDK mode when the server finishes connecting mid-turn
  • Fixed subagents running a different model than the main agent incorrectly flagging file reads with a malware warning
  • Fixed idle re-render loop when background tasks are present, reducing memory growth on Linux
  • Fixed "Manage Plugins" panel breaking when multiple large marketplaces are configured
  • Fixed Opus 4.7 sessions showing inflated `/context` percentages and autocompacting too early — Claude Code was computing against a 200K context window instead of Opus 4.7's native 1M